Question

What is the equation of this circle?

Answer 1

Can you identify its center based on the image ?

Answer 2

(0,1) ?

Answer 3

And can you identify the radius of the circle ?

Answer 4

is it 2?

Answer 5

It looks like it. And @RaphaelFilgueiras provided the general equation of a circle.

Answer 6

Is the equation x^2 + (y + 1)^2 = 2 ?

Answer 7

Close --but remember that in the form: (x - x0)^2 + (y - y0)^2, the point (x0, -y0) is the center. So you would reverse the sign of (y + 1) to (y - 1)

Answer 8

Kk, thanks!